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Normal temperature cured type tetrafluoroethylene fluorocarbon coating resin and preparation thereof

A tetrafluoroethylene and fluorocarbon coating technology, applied in the coating and other directions, can solve the problems of affecting the aging resistance of coatings, difficult to achieve alternating copolymerization, etc., and achieve the effects of easy automation, improved service life, and improved weather resistance.

Active Publication Date: 2008-12-17
JINAN HUALIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For tetrafluoro-type fluorocarbon coating resins (trifluoro-type also has this problem), because the reaction rate between vinyl acetate itself is far greater than the reaction rate between vinyl acetate and tetrafluoroethylene during polymerization, it is difficult to Realize the alternating copolymerization between monomers, thus affecting the aging resistance of the coating after it is made

Method used

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  • Normal temperature cured type tetrafluoroethylene fluorocarbon coating resin and preparation thereof
  • Normal temperature cured type tetrafluoroethylene fluorocarbon coating resin and preparation thereof
  • Normal temperature cured type tetrafluoroethylene fluorocarbon coating resin and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 250 grams of vinyl tertiary carbonate VV9, 260 grams of VV10, 75 grams of ethylene glycol monopropenyl ether, 250 grams of butyl acetate, and 235 grams of methyl isobutyl ketone into the small dissolution tank, start stirring and mixing, and slowly Add 14 grams of initiator (azobisisobutyronitrile), and stir to dissolve it. Vacuumize the 2.5-liter polymerization kettle, replace N2, and then vacuumize. Use the vacuum in the polymerization kettle to suck the mixed solution of monomer and initiator into the polymerization kettle. And start stirring, after the temperature drops to -8°C, open the tetrafluoroethylene monomer tank valve and add 390 grams of tetrafluoroethylene monomer. Raise the temperature of the polymerization kettle through the control system, control the reaction temperature to 80° C., and the reaction pressure to 1.8 MPa. After 18 hours of reaction, the sampling is qualified, and the temperature is lowered to normal temperature. Stop stirring, and re...

Embodiment 2

[0039] 25 grams of tertiary vinyl carbonate VV9425 grams, 90 grams of ethylene glycol monopropenyl ether, 45 grams of undecylenic acid, and 510 grams of butyl acetate are added to the dissolving tank, start stirring and mixing, and slowly add initiator (even Azodiisobutyronitrile) 11 grams, stirred to dissolve it. Vacuumize the 2.5-liter polymerization kettle, replace N2, and then vacuumize. Use the vacuum in the polymerization kettle to suck the mixed solution of monomer and initiator into the polymerization kettle. And start stirring, after the temperature drops to -10°C, open the valve of the tetrafluoroethylene monomer tank and add 450 grams of tetrafluoroethylene monomer, and the reaction pressure is 2.0 MPa. The temperature of the polymerization tank was raised by the control system, and the reaction temperature was controlled to 75°C. After reacting for 15-18 hours and sampling qualified, cool down to normal temperature. Stop stirring, and recover the incompletely rea...

Embodiment 3

[0042] Add 220 grams of tertiary vinyl carbonate VV9, 210 grams of VV10, 90 grams of ethylene glycol monopropenyl ether, 12 grams of undecylenic acid, 300 grams of butyl acetate, and 80 grams of methyl isobutyl ketone into the dissolution tank, and start Stir and mix, slowly add 10 grams of initiator (azobisisobutyronitrile) under stirring, and stir to dissolve it. Vacuumize the 2.5-liter polymerization kettle, replace N2, and then vacuumize. Use the vacuum in the polymerization kettle to suck the mixed solution of monomer and initiator into the polymerization kettle. And start stirring, after the temperature drops to -18°C, open the tetrafluoroethylene monomer tank valve and add 500 grams of tetrafluoroethylene monomer. Raise the temperature of the polymerization tank through the control system, control the reaction temperature to 70±2°C, and the reaction pressure to 2.6MPa. After reacting for 15-18 hours and sampling qualified, cool down to normal temperature. Stop stirrin...

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Abstract

The invention relates to a fluorocarbon coating resin, in particular to a room temperature cured tetrafluoroethylene series fluorocarbon coating resin which is synthesized by solution polymerization with tetrafluoroethylene monomer and vinyl ester of tertiary carboxylic acid as the main comonomers; the matching of raw materials is as follows: 25 percent to 40 percent of tetrafluoroethylene, 25 percent to 35 percent of vinyl ester of tertiary carboxylic acid, 5 percent to 8 percent of hydroxyalkyl olefine aether, 25 percent to 35 percent of organic solvent and 0.5 percent to 1 percent of evocating agent; the R<1> and R<2> of the vinyl ester of tertiary carboxylic acid are alkyl groups and the total number of carbon atoms is 5 to 9. The preparation method of the room temperature cured tetrafluoroethylene fluorocarbon coating resin comprises the steps of: adding the vinyl ester of tertiary carboxylic acid, hydroxyalkyl olefine aether, undecylenic acid and organic solvent into a dissolving tank, opening the valve of tetrafluoroethylene monomer tank when the temperature reduces to minus 20 to minus 5 DEG C, adding tetrafluoroethylene monomer and raising the temperature of a polymerizing pot by a control system for copolymerization. Due to the alternating copolymerization of the tetrafluoroethylene and the vinyl ester of tertiary carboxylic acid, the room temperature cured tetrafluoroethylene series fluorocarbon coating resin of the invention greatly improves weather resisting property of coatings and prolongs the service life of coatings.

Description

technical field [0001] The invention relates to a fluorocarbon coating resin, in particular to a room-temperature-curable tetrafluoroethylene-based fluorocarbon coating resin synthesized by solution polymerization using tetrafluoroethylene monomer and vinyl tertiary carbonate as main comonomers. Due to the alternate copolymerization of tetrafluoroethylene and vinyl tertiary carbonate, the weather resistance of the coating is greatly improved. Background technique [0002] At present, there are two types of room temperature curing fluorocarbon coating resins, one is the resin (tetrafluoro type) with tetrafluoroethylene as the fluorine-containing comonomer, and the other is the resin with trifluorochloroethylene as the fluorine-containing comonomer. (Trifluoro type), but both the tetrafluoro type and the trifluoro type are copolymerized with vinyl acetate and a small amount of monomers containing hydroxyl and carboxyl groups. For tetrafluorocarbon type fluorocarbon coating re...

Claims

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Application Information

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IPC IPC(8): C08F214/26C08F218/04C08F2/00C09D127/18C09D131/02
Inventor 郭希刚张景海张书香杨克济冯波
Owner JINAN HUALIN CHEM
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